joining me now, madeleine albright who is, of course, secretary of state in the clinton administration and zbigniew brzezinski who was carter's national security adviser. welcome back, both. zbigniew, let me start with you, this is about as tense a situation. what can washington or the world do to stop putin from doing what phil black was suggesting, which is moving even further and actually moving russian troops into ukraine proper? >> that prospect in my view is by far the more serious one because in effect, putin has claimed the right to intervene in ukraine itself, to intervene militarily by force, and the crimean scenario may be a preview of what he's planning, namely in some of the eastern regions of ukraine, which are inhabited by russian speaking ukrainians, some of whom are favorable to moscow, riots could be staged, could be provoked by moscow, and then russian troops would enter. this is what we have to deter, prevent, discourage. we have to take a stand publicly offering russia some sort of participation in an overall international effort to help stabilize the ukrainian eco